Chapter 7 (Using Network Clients)

Question 1

A program making requests

Answer 1

A Client

Question 2

— is a terminal emulation program

Answer 2

Telnet

Question 3

— is not designed to transfer any information between computers except your keystrokes as you type, and the characters that are displayed on the screen.

Answer 3

Telnet

Question 4

—- lists the users that are logged in on all hosts attached to the local network that have the r-utilities networking features activated.

Answer 4

rwho

Question 5

—- lists all hosts attached to the local network (that are using r-utilities) with the uptime for each

Answer 5

ruptime

Question 6

— logs in to a remote host; very similar to telnet, but uses the r-utilities authentication methods described in this section.

Answer 6

rlogin

Question 7

you can enter the — command with the -l option to specify the account name on oslo that you want to use.

Answer 7

rlogin

Question 8

you can use the — command to execute a program on a remote host without logging in

Answer 8

rsh

Question 9

to copy files between a host (r-utilities)

Answer 9

rcp

Question 10

A — procedure is a procedure that can repeat itself indefinitely.

Answer 10

Recursive

Question 10

The SSH package includes utilities such as —, which acts like rcp, letting you copy files between any two computers on your network with full encryption.

Answer 10

scp

Question 11

This process of copying an entire website or FTP site is called —.

Answer 11

Mirroring

Question 12

(wget command line option)

Download all supporting files to permit local display if a web page referred to on the wget command line.

Answer 12

-p

Question 13

(wget command line option)

Converts links in a download web page so that they refer to the download supporting files (such as images)

Answer 13

-k

Question 14

(wget command line option)

Retry the download the stated number of times if the download of the web page is interrupted for any reason.

Answer 14

-t 40

Question 15

(wget command line option)

View web page header information as the page and other files are downloaded.

Answer 15

-s

Question 16

(wget command line option)

Save downloaded web page header information to a file.

Answer 16

-s

Question 17

(wget command line option)

Use recursive downloads

Answer 17

-r

Question 18

(wget command line option)

Set the number of levels for recursive downloads; used with the -r option

Answer 18

-I 3

Question 19

(FTP commands)

Turn on binary mode

Answer 19

Bin

Question 20

(FTP commands)

Exit the FTP program

Answer 20

Bye

Question 21

(FTP commands)
Copy a file from one location to another on the FTP server; normally requires regular user access to the FTP server ( not just anonymous access)

Answer 21

cp

Question 22

(FTP commands)

Download a file

Answer 22

Get (file name)

Question 23

(FTP commands)

List files contained in the current directory on the FTP server.

Answer 23

ls

Question 24

(FTP commands) | Download multiple files using regular expression (such as .tgz)

Answer 24

Mget (expression)

Question 25

(FTP commands) | Create new directory on the FTP server; normally requires regular user access to the FTP server

Answer 25

Mkdir

Question 26

(FTP commands) | Upload multiple files using a regular expression (such as .html)

Answer 26

Mput expression

Question 28

(FTP commands) | Turn on or off prompting for download or upload of individual files when using mget or mput commands.

Answer 28

Prompt

Question 29

You can enter --- command to view the active networking interfaces.

Answer 29

ifconfig

Question 30

The --- ---- assigned to each interface is labeled inet addr on the second line of the corresponding section.

Answer 30

IP address

Question 31

The --- utility sends a diagnostic data packet to the computer you specify

Answer 31

ping

Question 32

The ping command sends a series of -- byte packets to the host with the IP address

Answer 32

64 byte

Question 33

What are the two major benefits of using traceroute?

Answer 33

Finding where a packet stops | Finding where a packet slows down

Question 34

Three well known methods of accessing Linux systems remotely are ---, the --- and the --- suite of utilities. The first two are considered unprotected and highly vulnerable and should not be used except for convenience on networks that are completely trusted.

Answer 34

Telnet, r-utilities, ssh

Question 35

The --- --- let you access a remote system without entering a password.

Answer 35

r-utilities

Question 36

Starts the --- graphical utility used to manage downloads of web pages.

Answer 36

kget

Question 37

A more advanced version of the ftp utility

Answer 37

ncftp

Question 38

Synchronizes a set of files that is stored on two or more systems and needs to be kept consistent as changes are made to the files.

Answer 38

rsync

Question 39

(wget command line option) | Mirror a web site using a recursive download of web pages

Answer 39

-m

Question 40

Telnet is able to do the following

Answer 40

- Log into a remote computer - You can view any files that your user account permits you to use - You can also execute any command, including changing or deleting files.

Question 41

To be able to telnet, you need to know the following.

Answer 41

- The remote host to which you want to connect. (Domain name or IP address) - Port number (default is 23) - The type of terminal that you want the software to emulate (standard choice is VT100) - Username and password

Question 42

--- are most effective when you can set up a configuration file on multiple computers where you have a user account.

Answer 42

r-utilities

Question 43

(note) You can enter the rlogin command with the -l option to specify the account name that you want to use.

Answer 43

|

Question 44

You can create a hidden file in your home directory called --- containing a list of hosts and user names that you want to permit access your account without a password.

Answer 44

.rhosts

Question 45

The --- --- is configured in the file /etc/ssh/sshd_config.

Answer 45

sshd daemon

Question 46

To check the status of the sshd server program, use the following command on the sever while logged in as root.

Answer 46

service sshd status

Question 47

If the server is ready to accept client connections, you should be able to use the following command on the client to connect to sshd on the server.

Answer 47

$ ssh -l username server

Question 48

(note) the ssh_host_rsa_key.pub contains a public key

Answer 48

|

Question 49

-- and --- are two types of encryption supported by ssh

Answer 49

RSA and DSA

Question 50

The default key length is?

Answer 50

1024 bits

Question 51

to alter the length of a ssh key, use this command

Answer 51

-b | (Example) ssh-keygen -t rsa -b 2048

Question 52

You can limit the number of recursive levels of recursive levels using the -- option to turn on recursive downloads and the -- option to set the number of levels of recursion to use

Answer 52

- r | - l